Valved flow control coupling



Aug. 25, 1959 l.. OSROW ET AL 2,901,213

vALvED FLOW CONTROL coUPLING Filed Feb. 4, 1957 lfm/11111114.

LEONARD OSROW HAROLD OSROW INVENTORY.

ATTY.

2301,21? Patented Aug. 25, 1959 VALVED FLOW CONTROL COUPLIN Leonard Osrow, Great Neck, and Harold Osrow, Roslyn, N .Y.

Application February 4, 1957, serial No. 638,082

12 claims. (o1. 251-352) This invention relates to a flow control means particularly adapted for use in conjunction with a conduit coupling device.

In the connection of conduits with each other coupling means are generally employed. It has been found desirable to incorparate valve or fluid control means in the coupling device in order to provide control of fluid flow therethrough.. In certain `applications, however, such fluid control means has presented serious dilliculties. An example of such situation is that encountered where it is required that one of the conduits be capable of angular displacement With respect to the other. Thus, for example, water utilization appliances or tools are presently in common use wherein a source of water supply, such as a hose or flexible conduit is attached to a tool and wherein water is fed or dispensed through the tool or appliance in the course of its utilization. A typical example of this type of tool or appliance, and one of the situations to which this invention is particularly adapted, is a car washing or similar brush. Devices of this character comprise an elongated rigid pipe or tube, one end of which is connected to the washing device, the other end thereof being connected to a source of water supply, such as for example the usual flexible garden hose. Water is fed into the tube through the hose and is thence supplied to the washing head or brush of the device. A rigid pipe or tube acts as a handle for manipulating the tube and serves to conduct the Water to the washing head. In some applications of this character it has been found particularly desirable to employ coupling means which permits axial displacement of the conduits from each other while maintaining the water tight sealed relation between the coupling means and the conduits. This axial displacement between the conduits has additionally aggravated the problem involved in providing an eilicient combined coupling and flow control valve.

It -is therefore an object of this invention to provide a combined coupling and ilow control means or valve to be interposed between two conduits which is capable of maintaining said conduits in iluid tight connected relation while permitting the control of lluid llow therethrough.

Another object of this invention is to provide a device of the character indicated which is capable of controlling iluid flow by the manipulation of one of the conduit members.

It is an additional object of this invention to provide a device of the character indicated wherein the coupling means permits the axial displacement of the conduits from one another without effecting the fluid tight coupling therebetween and without permitting any leakage therefrom and which coupling means is capable of acting as a fluid control valve in spite of the axial displacement of said conduits from one another It is also an object of this invention to provide a combined coupling and fluid control means which is capable of being selectively operated to open or closed position without introducing any leakage into the coupling means and which forms an eiiicient shut-off for duid flow when disposed in closed condition.

It is a further object of this invention to provide a coupling valve of the character indicated wherein an increase of iiuid pressure aids in providing a more efficient shut-off between the conduits when disposed in closed or shut-od condition Another object of this invention is to provide a coupling valve of the character indicated which may be readily and eiciently manufactured in mass production and in which the parts need not be manufactured to excessively precise tolerances and which may be readily assembled at low cost.

Other and further objects, benefits and advantages ofiv this invention will become apparent from the descriptiont understood that the invention herein disclosed may be: employed for other purposes for which the parts, structure: and arrangement are adapted.

In the accompanying drawings:

Figure 1 is a plan View of a coupling valve in accord ance with the present invention showing conduits con-- nccted thereto in broken lines;

Figure 2 is a cross-section of Figure 1;

Figure 3 is a view similar to Figure 2 showing a con-- duit axially displaced or rocked with respect to the coupling valve; while in closed or shut oil condition;

Figure 4 is an exploded view in perspective of the plug and diaphragm assembly.

As shown in Figures 1 and 2 the instant coupling valve device designated generally by the numeral 10 comprises a hollow cylindrical body having a threaded portion 12 formed at one end thereof. Said threaded end portion 12 is adapted to receive a conventional complementary male thread of the end of a conduit 11. A Washer 31 is provided in the interior of the coupling to form -a uid tight seal therewith. A sleeve 13 of reduced diameter extends from the threaded end portion 12 of the cylindrical body and an annular shoulder is formed at the juncture of said threaded end with the sleeve. Sleeve 13 terminates in an inwardly extending lange 14 which therefore forms a more restricted annular opening at the other or outlet end of the coupling valve. Positioned within sleeve 13 is a sealing ring 15 having a circular cross-section and bearing against the interior Wall of said sleeve 13 in water tight engagement therewith.. Sealing ring 15 is formed of an elastomeric or rubber-like material and advantageously comprises a rubber O ring. The diameter of the sealing ring 15 is such that the body of the ring extends beyond the peripheral edge of ange 14 and therefore overlies the annular opening 16 defined by said ange and the outer Wall surface 17 of conduit 18. The numeral 18 represents a conduit, tube or pipe provided With an end, termination disposed within sleeve 13 having an out.

wardly extending lip or bead 21. The outer diameter of' tube 18 `is smaller than the diameter of the peripheral edge of flange :14 so that it is spaced from the peripheral edge of said opening when the conduit 18 is positioned within the coupling as shown at 16. The inside diameter of sealing ring 15 is such that when tube 18 is inserted Within the sleeve and through the annular opening, a compressive force is exerted upon said ring suiicient to form a water tight sealing contact between the outer surface of conduit 18 and also with the inner surface of the sleeve 13, the sealing ring 1S overlying the clearance space 16 between said flange 14 and said conduit. Conduit 18 terminates in a ferrule or cap 23 having a transverse wall 24 which is coi-extensive with the cross-section of said conduit. Said wall is conveniently mounted across the end of conduit 18 by `being formed as an integral part of cylindrical ferrule 23. The cylindrical cap or ferrule is secured within the endl of conduit 18 as by means of africtionalv pressed fit. Transverse wallV 2.44 isY provided with `an aperture 25 extending therethrough to providecommunication between the conduit and the coupling body. Aperture 25' isl eccentrically. disposed in theitrans.` verse wall 24 of the cylindrical' ferrule 23: and'. iis-offset) from. aperture Zaswill more clearly appearhereinafter.

A plug 2t) having an outer surface complementany. tot. the. inner surfacel of the sleeve is transversely. disposed at` thejuncture of the sleevewithI thel threaded: endipon tion and is similarly advantageously securediin: positionv by.` a simpley frictional-pressed lit. A centrally disposed aperture 26 is provided through. the body. off plug. 20de: permit; water to pass4 therethrough As may` be'. more clearly. seen from Figures 3 and 4',.plug 20.? is forrnedtwitll'` ai recess or depression 27S which, in the embodiment off the invention herein illustrated extends in chordal rela tion withl respect` to the circle dened bythe plug.. The recess 27y is. disposed in confronting relation with. respect to. transverse wall 2.1i. A portion of. depression' 2% exitends. diametrically across aperture 26. extending through the body. ofthe plug. A.diaphragm 282is.disposedf with? iu recess` 27'. Said diaphragml 28' is:f0rmed of an elas tomeric material such as rubber. anditsloosely. within the recess 27 defined by shoulders 29i The diaphragm is ofi greater. width than the depth of; recess 28 andzisf. so disposed, as to extend across a portionv of' opening 26e formed in plug 2t). As may be seen from Figures: 2' and 3 the diaphragm is thus captured between the end ofconduit 18, as defined by. transverse wall 24, and'plug 20,. Said diatgnhragmZ is, therefore confined with respect to its movement in an axial direction and it is confined againstlateral displacement by abutment shoulders 29. as well as by the sleeve wall. When'. the couplingandcon-z` duit 18v areA in the relative positions, as illustratedl in Figure 2, uid ow from the coupling into the conduit is accomplished through the apertures 26; and 25'.` It' should be noted thataperture 25v isotiset fromthediae phragm in that position. However,.when.condi1it 18;` is:l rotated with respect to the coupling to .the-positic-nashown in Figure 3, the plane surface of'theqdiaphragmiZSfis: brought into confronting relationy withA that. portion ofi transversewall 24-in which aperture, 253is provided and: the diaphragm overlies said aperture. Inithis-:positionf uidow from the coupling into the conduit is.conse-. quently. restricted. The water passing throughapermre. 261strikes the portion of the diaphragm overlyinga portion thereofr and moves theV diaphragm forward toward wallfZd; The. fluid pressure bearingagainst the surface: of thev'free iioating diaphragm forces the diaphragnrinto sealingcontactwith transverse wall Mfthereby eiectiveiy sealing;off aperture 25 against=fiuid flow and actingasa shutsofl valve between the coupling and the conduit; It; shouldhenotedfrom Figure 3 thatralthoughrthecoupling: and conduit arel rocked or axially. displaced from4 one. another the free oatingcharacterzof thediaphragmand. the clearances provided by thegconningnvalls p ermitzit'- to -be brought into sealingA contactzwiththe. surfacefof the; transverse wall 2,4 `and to assume an angular disposition. parallely to said;wall V surface.A It should; further; be. noted'I that due to the. elastomericl character 'oftheruhberi da-` phragm said diaphragm lmay be compressedjsoas'to Aeifecti Thus for exam-ple, oneor more projecting-t vtransverse wall against which it abuts;

4 i recesses formed in the body of the diaphragm. By providing similar clearance between the walls of openings in the diaphragm body, the diaphragm will be restricted in its ability to rotate with relation to the plug but will nevertheless be in iioating relationship therewith so that the face of the diaphragm would be free to assume a position parallel with the plane of transverse wall 24 and would thus be capablev of sealing contact therewith when itoverliesthe aperture therein. Another modified form ofthe invention may be to form projecting bosses on the'face of the diaphragmiin-confrontingrelation' with the plug, which is then providedwith complementary dimples: or openings allowing the requisite clearance and performing similar functions. In each case the diaphragm would be free for oating movement giving it adequate play to assume an angular position similar to the disposition of the transverse wall and to make sealing contact therewith while being confined against rotation in relation to; the plug. It is signiiicant that the-conduit and body of.- the coupling' device' may be rotated with1relation to each other as well as rocked or tilted withoutfiny any: way afecting'the seal between the coupling body and the. conduit nor the effectiveness of the shut-olfl means.

In assembling.- the device the sealing ring 1S is-insert'edi into. the sleeveportionl of the coupling and/thereupon'A they tube. 18- is passed through annular opening 16': The' entire assembly is then enclosed by means of transverse plug; Zlxafter the diaphragm has been interposed therein'. T-he plug prevents the withdrawal of the conduit fromthe coupling. The. thickness of the plug is suchthat when seated,A the-inner surfacethereof is spaced from the beaded' end; of. the tube thereby providing a clearance space tol permit the rocking. movement or angular displacement' ofthe conduit with respectto the coupling. This. clearance space is partially occupiedv by the diaphragm. In View of the constructiondisclosed it will beapparentthat the tube and coupling may be rotated relative to each other, the sealing ring acting as abearing meansand; maintaining a water tight seal between the parts in spite of suchrotation. It'will be further apparent, as shown in Figures 2 and 3, that the coupling andthe conduit may be rocked, tilted or angularly displaced so thattheir longitudinal axes. assume an angle with respect to. eachother without-impairing the water tight seal betweenthe parts or effecting the shut-off action of the diaphragm. Int this connection it should be noted that theV outer-y peripheral wall of the tube rides upon the circular sur.- face presented by the sealing ringand that the positionv ofthe diaphragm conforms itself' to the surface of the. It will also beA apparent-that the coupling valve may be selectively op'- eratedby` simply rotating the conduit 18 with-respect to.4 the vbody of the coupling so as to bring aperture 25' into or out of registration with the body of the diaphragm.

Wefhave-1 here shown and described'a preferred-embodiment of our invention. it will be apparent, however, that thisvinvention is not limited to this embodiment: and that many changes, additions and modicationscarrl be made'in connection therewith withoutdeparting from the spirit and scope of the invention as herein disclosed and hereinafter claimed.I

We claim:

1. A valved coupling device for interconnecting conduits and controlling the flow of fluid therethrough, comprisinga hollow cylindrical body having end portions for receiving the ends of a pair of conduits respectively,

one of said conduits being rotatably mounted within# said body, means for controllingI the ow of'fuid through'. said ybodyY and, between said conduits, said means. compraisingv a transverse plug provided with an aperture there.-A throughdisposed within said body between said'endJ-por-z tions, said plug being provided Awith a recess in the'faccI thereof in.y confronting relation with the end; of saidrotatablei conduit, said. -recess being offset from .said aperture;4 a diaphuagmdisposedain said recess, autransverse wall/dis@` posed across the end of said rotatable conduit provided with an aperture therethrough, said wall aperture being located so as to be brought into and out of registration with said diaphragm upon rotation of said rotatable conduit with respect to said body, so that said diaphragm overlies said wall aperture when it is in registration therewith and in sealing contact with respect to said wall.

2. A valved coupling device for interconnecting conduits and controlling the ow of uid therethrough, comprising a hollow cylindrical body having end portions for receiving the ends of a pair of conduits respectively, one of said conduits being rotatably mounted Within said body and tiltable with respect thereto, means for controlling the ilow of iluid through said body and between said conduits, said means comprising a transverse plug provided with an aperture therethrough disposed within said body between said end portions, said plug being provided with a recess in the face thereof in confronting relation with the end of said tiltable conduit, said recess extending across a portion of said Iaperture, a diaphragm disposed within said recess, a transverse wall disposed across the end of said tiltable conduit provided with an aperture therethrough, said aperture being located so'as to be brought into and out of registration with said diaphragm upon rotation of said rotatable conduit with respect to said body, so that said diaphragm overlies said aperture when it is in registration therewith and thereby shuts oi iiuid ow therethrough.

3. A valved coupling device for interconnecting conduits and controlling the iiow of fluid therethrough, comprising a hollow cylindrical body having end portions for receiving the ends of a pair of conduits respectively, one of said conduits being rotatably mounted within said body and tiltable with respect thereto, means for controlling the ow of liuid through said body and between said conduits, said means comprising a transverse plug provided with an aperture therethrough disposed within said body between said end portions, said plug being provided with a recess in the face thereof in confronting relation with the end of said tiltable conduit, said recess extending across a portion of said aperture, a diaphragm moveably disposed within said recess and overlying said portion of said plug aperture, a transverse wall disposed across the end of said tiltable conduit provided with an aperture therethrough, said wall aperture being located so as to be brought into and out of registration with said diaphragm upon rotation of said rotatable conduit with respect to said body, so that said diaphragm overlies said wall aperture when it is in registration therewith and is moved into sealing contact with respect to said wall by the impingement thereon of the fluid through said plug aperture.

4. A valved coupling device for interconnecting conduits and controlling the iiow of iiuid therethrough, comprising a hollow cylindrical body having end portions for receiving the ends of a pair of conduits respectively, one of said conduits being rotatably mounted within said body and tiltable with respect thereto, means for controlling the flow of iluid through said body and between said conduits, said means comprising a transverse plug provided with an aperture therethrough ixedly disposed within said body between said end portions, said plug being provided with a recess in the face thereof in confronting relation with the end of said tiltable conduit, said recess extending across a portion of said aperture, a diaphragm moveably disposed within said recess and overlying said portion of said plug aperture, a transverse wall disposed across the end of said tiltable conduit located within said body, said diaphragm being confined for limited movement by the walls defining said recess in the plug and said transverse wall, said transverse wall being provided with an aperture therethrough so located as to be brought into and out of registration with said diaphragm upon rotation of said rotatable conduit with respect to said body, so that said diaphragm overlies said wall aperduits and controlling the ow of i'luid therethrough, comprising a hollow cylindrical body having end portions for receiving the ends of a pair of conduits respectively, one of said conduits being rotatably mounted within said body and tiltable with respect thereto, means for controlling the flow of Huid through said body and between said conduits, said means comprising a transverse plug provided with an axial aperture therethrough xedly disposed Within said body between said end portions, said plug being provided with a recess in the face thereof in confronting relation with the end of said tiltable conduit,

said recess being disposed in chordal relation with respect to the circumference of said plug and extending across a portion of said aperture, a diaghragm moveably disposed within said recess and overlying said portion of said plug aperture, a transverse Wall disposed across the end of said tiltable conduit located within said body spaced from said plug and diaphragm, said diaphragmy being confined for limited movement by the walls defining said recess in the plug and said transverse wall and having a planar surface in confronting relation with said wall, said transverse wall being provided with an aperture therethrough so located as to be brought into and out of registration with said diaphragm upon rotation of said rotatable conduit with respect to said body, so that said diaphragm overlies said wall aperture when it is in registration therewith and the planar surface of said diaphragm assumes a position parallel with the confronting surface of said Wall and is moved into sealing contact therewith by the impingement thereon of the fluid through said plug aperture.

6. A valve coupling device for interconnecting a pair of conduits and controlling the iiow of fluid therethrough, said device comprising a hollow cylindrical body having an end portion adapted to be connected to a conduit, a second conduit disposed within the other end portion of said body rotatable with respect thereto and in fluid tight sealing engagement therewith, a plug transversely disposed within said body between the terminal portions of said conduits, said plug being provided with an aperture therethrough to permit iluid flow between said conduits,

said plug being further provided with a depression extending across at least a portion of the aperture formed therein, a diaphragm disposed within said depression, said diaphragm being confined for restricted movement by the walls of said depressed area, a transverse wall disposed across the terminal portion of said second conduit located within said body additionally coniining said diaphragm, said wall being provided with an aperture therethrough offset from the aperture provided in said plug, said aperture being disposed so as to be brought into and out of confronting relation with respect to said diaphragm by the rotation of said second conduit.

7. A coupling device for interconnecting a tube with a hose, said coupling device comprising a hollow cylindrical body having an internally threaded end adapted to be engaged with the complementary threaded end of a fitting on said hose, a sleeve of reduced diameter extending from said threaded end, an inwardly extending ilange provided at the outer end of said sleeve deiining an annular opening in the other end of said coupling, a sealing ning of rubber-like material positioned within said sleeve adjacent said flange and in watertight sealing contact with the linner wall surface of said sleeve, a tube extending within said sleeve, an end of said tube having an outwardly extending bead formed thereon, said bead being of larger diameter than said annular opening, the outer diameter of said tube being smaller than the inner diameter of said iiange whereby a clearance space is formed between the peripheral edge of said ange and the outer surface of said tube to permit said tube to be rocked with respect tosaidsleeve, said tube beingfin water. tight. sealing engagement with-said sealing ring; a.transverse plugv positionedvuithin said sleeve at thejunctureof. Saidthreaded end-with saidsleeve to preventthe retraction of-s-aid tube fronty said sleeve, saidplug being spaced fromV the beaded. end of said tube avdistance suicient topermit said tube. to-be rocked with respect to said sleeve, said transversel plug being provided with an aperture to-permiit thepaS- sage of water therethrough whereby said tube is free. for rotation with respect to saidhollow body and may be. rocked with respect thereto without disturbing the waterV tight character of said seal, a transverse wall disposed acrossthe terminal portion of said tube provided with'an. aperture therethrough olset from the aperture in said plug, said plug being further providedwith a'. depressioniY in the surface thereof in confronting relation with said` tube said depression extendingl across a port-ion' of the aperture therein, a diaphragm disposed within' said' depression the aperture in said-.walLbeing so-located astobe. brought into and out of registration withsaid dia-- phragm upon the rotation of said tube with respect' to.- said body so that said diaphragm may'bel selectively dis-- posed over the aperture in said-tube: walland in sealing; relation therewith.

S. A coupling device for interconnecting, aztubefwith a hose, said coupling device comprising ahollow cylin.-- drical body having an internally threaded end adapted.E to, be. engagedwitlrthe complementary threaded.` end of'a litting on`- said hose, a sleeve of reduced diameter extending frorn said threaded end, an inwardly extending flange provided at the outer end of said sleeve definingf an' annular opening in the other end of `said coupling, avsealing ring of rubber-like material positioned within said sleeve adjacent said ilange and rin Water tight sealing.4 contact with the inner wall surface of said sleeve, a tube extending within-said sleeve, an end of said'tube havingan outwardly extending bead formed thereon, said bead being of larger diameter than'said` annular opening, the outer diameter of said tube being smaller than the inner diameter' of said ange whereby a clearance space is. formed. between the peripheral edge of said ange and the outer surface of `Said tube to=perrnit said tube toy be. rocked with respect tosaid` sleeve, said tube: being` in. water tight sealing engagementl with said sealing ring, a transverse plug positioned within` said sleeve at the juncture of. said threaded end'withsaid sleeve to prevent the retraction of'- said'tube from-y said sleeve, Sm'd plugy being spaced from the beaded-fend of said tube a distance suhcienty to permit said tube'to be rocked with respect to. said sleeve, said transverse plugbeing provided-with anv aperture. to permit the. passage ofi watertherethroughwhereby said tube is free for rotation with respect to said hollow body andmay be rockedY with respect thereto without disturbing. the. water tightcharacter of said-seal, said plug' being further provided with a. recess in the face thereof: in confrontingrelation with the endof said tube, said recess extending acrossv a portion of said aperture, a. diaphragm moveably disposed within said recess and overlying saidportionot saidplug aperture, atransverse wall disposed across the end of said tube lccated'withinsaid;l body, said diaphragm being `confined for limited' movement by the walls definingV said recess-in the plug andfsaid transverse wal-l, said transverse Wallbeing provided with-an' aperture therethrough so located as to be brought into and out-of` registration with said diaphragmupon'mtationzofsaid tube with respect to said body, sothatV said diaphragm overlies said wall aperture when it -isinregistration therewith. and is moved into sealing contact with the face of saidfwall by the impingement thereon ofthe iluid through saidplug aperture.

9J Acoupling device for interconnecting a tube with a hose, said' coupling device comprising -a hollow cylindricalbo'dy'having an internally threaded end adapted to be' engaged with the complementary threaded end of a fitting 8v onsaid hose, a sleeve of reduced diameter extending from. said threaded end, an. inwardly extending flange provided at the outer endof said sleeve dening. an annular opening in the other end of said couplingyasealingring, of, rubber-like materialpositioned-withinsaid sleeve adjacent said flange. and in. water tight sealing. contact with the inner walllsurface of said sleeve, atube extendingwithin. said. sleeve, an endof said tube having an outwardly eX- tendingv beadformed thereon, said bead being of larger diameter than said annular. opening,.the outer diameter of said tube being smaller than the inner diameter of said flange whereby a clearancespace is formed between the peripheral edge of said flange and the outersurface of said tube to permit said tube to be rocked with respect to said sleeve, said tube being in water .tight sealing engagement with said sealing ring, atransverse plug positioned within. said sleeve at the juncture off said threadedI end withsaidV sleeve to prevent the retractionof 'said' tube from said sleeve, said plug being spaced from the beaded' end of said tube a` distance suicient to permit said tube to-be rocked with respect to saidV sleeve, said transverse plug beingprovidedwith an aperture to permit the passage of water therethrough whereby said'tube is free for rotation with respect to said' hollow body and may be rocked'V being conlinedfor iimited'movement by the walls defining said'recess in the plug and said transverse wall and having aplanar surface in confrontingrelation with said wall, said' transverse wall being provided with an aperture therethrough so located as to be brought into and' out of registration with said diaphragm upon rotation of saidI tube with respect to said body so that said diaphragm overles saidwall aperture when it is in registration therewithV and .the planar surface of said diaphragm assumes a position parallel with the confronting surface of saidv wall and' is moved into sealing contact therewith by the impingement' thereon of the fluid through said' plug aperture.

l0; A valved coupling device for interconnecting conduits and controlling the how of fliuid' therethrough, cornprising a hollow body having end portions for receiving the ends. of a pair of conduits respectively, at' least one ofsaid conduits being mounted for rotation with respect to said body, an apertured transversewall disposed' across the endv ofsaidk rotatable conduit, an apertured transverse plug'disposed within said body in juxtapositionwith said wall being provided with a recess which intersects said plug aperture, a'hoating'diaphragm disposed' between said wall' and said plug, and confined for limitedv movement ink said* recess, theV said diaphragm being selectively disposed inl sealingy relation with respect to the aperture in said' wall upon' the rotation of saidI rotatable conduit.

ll. A valved coupling device for interconnecting conduits and'controlling the iow of fluid therethrough, comprising'a hollow body having end portions for receiving the terminal portionsk of" a pair o-f conduits respectively, said body and1 atleast one of said conduits being rela.- tively rotatable, an apertured' transverse wall disposedI acrossrthe terminal portion' of said one conduit, anA apertured transverse plug disposed within said body in confronting relation-with said wall and spacedtherefrom, the aperture in` said wall being oilzset from the aperture in' said plug; said plug being providedv witha recess which intersects said plug aperture, a iloating diaphragm disposed inthe space. betweenV said wall and' said plug conned for limited movement in said recess and adaptedrto be selectively brought into registration with the aperture in said wall upon relative rotation between said body and said one conduit to thereby shut oi the ow of uid therethrough, and to permit such ow when brought out of registration therewith.

12. A valved coupling device for interconnecting a pair of conduits and controlling the flow of fluid therethrough, said device comprising a hollow cylindrical body having a terminal portion adapted to be connected to a conduit, a second conduit having a terminal portion disposed within the other end portion of said body, said body and second conduit being relatively rotatable and in fluid tight sealing engagement with each other, a plug transversely disposed within said body between the terminal portions of said conduits, said plug being provided with an aper- 15 ture therethrough to permit tluid ow between said conduits, a transverse wall disposed across the terminal portion of said second conduit located within said body, a diaphragm disposed intermediate said plug and said wall and confined for limited axial movement therebetween, means associated with said plug and complementary means associated with said diaphragm for restricting the degree `of radial displacement of said diaphragm, said wall being provided with an aperture therethrough oiset from the aperture provided in said plug, said aperture being disposed so as to be brought into and out of confronting relation with respect to said diaphragm by the relative rotation of said body and second conduit.

Smith Feb. 6, 1900 Reilly Apr. 19, 1949 

